A008508 - cp's OEIS frontend

A008508 Number of odd primes less than n-th odd composite number.

n	a(n)
1	3
2	5
3	7
4	8
5	8
6	10
7	10
8	11
9	13
10	14
11	14
12	15
13	15
14	17
15	17
16	18
17	20
18	20
19	21
20	22
21	22
22	23
23	23
24	23
25	24
26	26
27	28
28	29
29	29
30	29
31	29
32	29
33	29
34	30
35	31
36	31
37	33
38	33
39	33
40	33
41	35
42	35
43	36
44	36
45	37
46	38
47	38
48	39
49	39
50	41
51	41
52	41
53	41
54	43
55	45
56	45
57	45
58	45
59	45
60	46

[3, 5, 7, 8, 8, 10, 10, 11, 13, 14, 14, 15, 15, 17, 17, 18, 20, 20, 21, 22, 22, 23, 23, 23, 24, 26, 28, 29, 29, 29, 29, 29, 29, 30, 31, 31, 33, 33, 33, 33, 35, 35, 36, 36, 37, 38, 38, 39, 39, 41, 41, 41, 41, 43, 45, 45, 45, 45, 45, 46]

cp's OEIS Frontend

A008508 Number of odd primes less than n-th odd composite number.

Table of values

List of values

n	a(n)
1	3
2	5
3	7
4	8
5	8
6	10
7	10
8	11
9	13
10	14
11	14
12	15
13	15
14	17
15	17
16	18
17	20
18	20
19	21
20	22
21	22
22	23
23	23
24	23
25	24
26	26
27	28
28	29
29	29
30	29
31	29
32	29
33	29
34	30
35	31
36	31
37	33
38	33
39	33
40	33
41	35
42	35
43	36
44	36
45	37
46	38
47	38
48	39
49	39
50	41
51	41
52	41
53	41
54	43
55	45
56	45
57	45
58	45
59	45
60	46

n	a(n)
1	3
2	5
3	7
4	8
5	8
6	10
7	10
8	11
9	13
10	14
11	14
12	15
13	15
14	17
15	17
16	18
17	20
18	20
19	21
20	22
21	22
22	23
23	23
24	23
25	24
26	26
27	28
28	29
29	29
30	29
31	29
32	29
33	29
34	30
35	31
36	31
37	33
38	33
39	33
40	33
41	35
42	35
43	36
44	36
45	37
46	38
47	38
48	39
49	39
50	41
51	41
52	41
53	41
54	43
55	45
56	45
57	45
58	45
59	45
60	46

n	a(n)
1	3
2	5
3	7
4	8
5	8
6	10
7	10
8	11
9	13
10	14
11	14
12	15
13	15
14	17
15	17
16	18
17	20
18	20
19	21
20	22
21	22
22	23
23	23
24	23
25	24
26	26
27	28
28	29
29	29
30	29
31	29
32	29
33	29
34	30
35	31
36	31
37	33
38	33
39	33
40	33
41	35
42	35
43	36
44	36
45	37
46	38
47	38
48	39
49	39
50	41
51	41
52	41
53	41
54	43
55	45
56	45
57	45
58	45
59	45
60	46